Boring-tool for oil-wells and the like



M. BELCHER. v BORING TOOL FOR OIL WELLS AND THE LIKE.

APPLLCATION FILED APR. 22, 1920.

1,368,538. 1mm Feb. 15,1921.

ATTORNEY.

PATENT: OFFICE.

MARK BELCHER, OF GOOSE CREEK, TEXAS.

BORING-TOOL FOR OIL-WELLS AND THE LIKE.

To all whom it may concern Be it known that I, MARK BELQH R, a citizen of the United States of America, and resident of Goose Creek, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Boring-Tools for Oil-Wells and the like, of which the following is a specification. I

' This invention relates to combined wheel bits and reamers and has for its object the provision of novel means whereby the drilling operation may be carried on and the wall of the hole being drilled will be smoothed simultaneously, the device for effecting the smoothing of the wall being designed to roduce an effect similar to that produced y the troweling process. In other words, the device is intended to both bore and ream simultaneously.

A further object of this invention is to produce a combined bit and reamer in which the bit and reamer are held in assembled relation to each other and the reamer blades are removably connected to the stock and held therein against movement when the parts are assembled. The said device is 7 also effective tdindicate that the bit becomes worn and its gage is reduced beyond that which safety permits. I

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in which Figure 1 illustrates a view in elevation of a combined bit and reamer;

Fig. 2 illustrates a vertical sectional view; and I Fig. 3 illustrates a cross sectional view.

In these drawings 5 denotes the bit stock having a channel 6 therein for the admission of water and divergingports 7 and 8 discharging from the channel to the sides of the stock and into position where it will reach the cutting edge of the bit 9. The discharge openings of the ports are preferably elongated transversely of the bit stock. I

The lower end of the stock has a dove Specification of Letters Patent.

Application filed April 22,

Patented Feb. 15, 1921.

1920. Serial No. 375,803.

tailed or downwardly tapered recess 10 into WhlCll the upper end of the bit 9 fits, it being necessary in applying the bit to the stock to insert the same from one edge.

The head of the bit is reduced in width, thus forming the shoulders'll.

The,reamer blades 12 and 13 are of identical construction and, therefore, a description of one will suffice as a disclosure of their configuration and their relation to the other parts.

The stock 5 has a dove tail groove 14 at each edge and the reamer blade which fits in it is inserted from the top and bears against a shoulder 11 of the blade. The reamer blade is preferably convexed on one surface as shown at 15 in order. that it will bear against the wall of the hole and in its travel smooth the surface and compress it orream it so that it will receive the casing to enter the hole without encountering obstructions.

The joint between the stock and reamers is shown in the cross sectional view, but it is understood that the grooves or channels 14: and the inner edges of the reamers may be differently shaped to form interlocking connections and I do not wish to be limited 1 with respect to these details.

The lower ends of the reamers bear against the shoulders 11 of the bit and against the edges of the shank or head so that movement of the bit is prevented.

The upper end of the stock has the usual connection for the hollow rod 17 and the said hollow rod is applied to the bit stock preferably by threading. The upper end of the bit stock is reduced in width and threaded to engage the collar 16, and the lower end of the said collar will bear against the upper ends of the reamers so that all of the parts are interlocked and held against movement with relation to one another.

The reamers are made with the curved channel 6 in the stock but the details .in this respect are immaterial and may be changed to suit particular requirements.

I claim:

1. In a boring tool for oil wells and the like, a stock having a channel therethrough with ports for the discharge of water, said stock having a recess in its end, a bit having a head seated in the recess and anchored therein, said stock having vertically disposed grooves in its edges, reamers slidable in the said grooves, and means for holding thereamers in engagement withthe bit.

2. In a boring tool for oil wells and the like, a stock having a bit seat in its lower end, said seat having downwardly tapered walls, a bit having a head conforming to the configuration of the said seat, said stock having dove-tailed grooves in its edges, reamers having the configuration a counterpart of that of the grooves seated in said grooves and having their ends bearing against the bit, and means for holding the reamers in place.

3. In a boring tool for oil wells and the like, a stock having a recess in its lower end and grooves in its walls, a bit having a head fitted in the said recess and shouldersj at the junction of thebit and head,

. reamers seated in the grooves of the stock and having their edges bearing against the edgesof the head of the bit and their ends bearing against the shoulders of \the bit, means .for holding the reamers against lateral movement, a rod threaded on the stock,

and a collar threaded on the stock having its lower end engaging the reamers to hold them in place.

5. In a boring tool for oil wells and the like, a stock having a recess in its ends, a bit having a head seated in the recess and anchored therein, said stock having vertically disposed grooves in its edges,

reamers slidable in the said grooves, and means for holding the reamers 1n engageinent with the bit.

g MARK BELCHER. 

